Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 68,509	$ 73,222
Short-term investments	134,815	214,280
Accounts receivable, net	32,980	28,070
Inventories	49,215	51,476
Prepaid expenses and other current assets	5,700	6,597
Total current assets	291,219	373,645
Restricted cash	3,329	3,311
Property and equipment, net	13,273	15,876
Operating lease right-of-use assets	5,375	6,117
Other assets	605	1,166
Total assets	313,801	400,115
Current liabilities:
Accounts payable	5,827	603
Accrued compensation and related benefits	19,005	21,519
Accrued expenses and other current liabilities	13,459	16,227
Accrued warranty liability	3,712	3,620
Deferred revenue, current	11,727	8,662
Operating lease liabilities, current	1,593	1,318
Total current liabilities	55,323	51,949
Accrued interest	896	113
Deferred revenue	101	151
Operating lease liabilities, noncurrent	4,482	5,576
Term loan	130,113	96,336
Total liabilities	190,915	154,125
Commitments and contingencies (Note 6)
Stockholders' equity:
Preferred stock, $0.001 par value; 5,000 shares authorized, and no shares issued and outstanding as of December 31, 2023 and 2022	0	0
Common stock, $0.001 par value; 300,000 shares authorized as of December 31, 2023 and 2022; 50,317 and 48,465 shares issued and outstanding as of December 31, 2023 and 2022, respectively	50	48
Additional paid-in capital	1,084,515	1,035,456
Accumulated other comprehensive loss	68	(564)
Accumulated deficit	(961,747)	(788,950)
Total stockholders' equity	122,886	245,990
Total liabilities and stockholders' equity	$ 313,801	$ 400,115